Non-invasive blood pressure – NIBP & Use:-
- Measuring blood pressure is a component of heart monitoring.
- Patients undergoing anesthesia require that it be measured at least every five minutes at the beginning of the procedure and during the procedure.
- If the patient is restless, it is needed more often.
- The automation of this work allows the anesthetist and nurse to perform other tasks while being able to observe the patient as closely as possible.
Non-invasive blood pressure (nibp) monitor guidance:-
Most automated instruments use an oscillatonometric principle. A suitable blood pressure cuff is placed in the patient’s arm. Care should be taken to select a suitable size cuff and tie it one inch above the elbow.
The most accurate pressure measured by NIBP is average arterial pressure.
The most important determinant of the accuracy of the pressure is the width of the cuff. It should be 40% of the mid-circumference of the limb (length should be twice the width).
When activated, the pressure of the cough almost increases. Systolic blood pressure above 50 mm Hg. Cuff pressure is gradually reduced to small portions. As the systolic pressure approaches, small swings appear in the cuff pressure. The amplitude of this oscillation increases as the cuff pressure decreases further.
The swings disappear under diastolic pressure. The maximum oscillation is observed in the average blood pressure. It may not be appropriate to use NIBP more than once every three minutes. In such cases, invasive observation is recommended.
- Cuffs that are too narrow tend to lower blood pressure while those that are too wide deplete BP.
- They overestimate at low pressure and devalue at high pressure.
- They can also give false results in patients with atrial fibrillation or other arrhythmias.
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